Write a letter to your friend explaining to him why you have failed to keep the appointment with him.
Banglabazar, Dhaka-1100
08 December 2018
My Dear Kamal,
Hope you are ok by the grace of Almighty Allah. I regret that I failed to keep my appointment with you on your important function in which my presence was very much needed to you. I feel seriously regret how much worries you had dame in my absence without information. Dear Kamal, believe me; I failed to come because of my sister’s sudden illness. I had to take her to the hospital and got her admitted there. She is still in hospital for treatment. She is not yet out of danger. Some of our friends have also come to the hospital to see her. If you come you will see how much I am busy in nursing her. She is in Dhaka Medical Hospital in Room No.310 where I am staying.
I hope you have understood the cause of my failure in attending your important function. Hope this will not happen again in future. Looking forward to seeing you. With best wishes.
Your Sincerely
Fahad